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automatically slowed it down if it was going too fast. that technology exists. it's called positive train control. >> if this technology was in place, would this accident have happened? >> probably not. it allows a central computer to recognize that the train is going too fast and automatically slow it down. >> reporter: it's widely used in europe, but its development has been stalled in the u.s. experts hope this crash will be a wakeup call. but tonight the focus is on that train operator. investigators say his blood alcohol tests came back negative. so tonight, diane, the big question, did he fall asleep. >> gio benitez reporting in for us. thank you, gio. >>> now tonight we want to tell you about a new outbreak of dangerous meningitis on a second college campus. on the east coast you remember that first scare at princeton university but tonight two schools are on opposite sides of the country. here's dr. richard besser on the four students infected at the university of california in santa barbara. >> reporter: aaron loy, a healthy freshman lacrosse player, was rushed to the hospital by
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Search Results 0 to 1 of about 2